[sdiy] 3PDT

[J. Larry Hendry]

SP3T switches are indeed available.  They feel like a SPDT with center off,
but the center off position is not off. These switches actually have 2
poles.  They switch like this:
pole 1 (center to top/bottom)
ON / OFF
ON / OFF
OFF /ON

pole 2
ON / OFF
OFF / ON
OFF / ON

They "look" like DPDT switches from the back, but they are not.  You have to
connect a jumper from the one pole to the other to get 1P3T operation.

See small attached graphic file.

Larry Hendry


----- Original Message -----
From: mark s <djarum11 at mindspring.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Monday, May 24, 2004 8:41 PM
Subject: Re: [sdiy] 3PDT


ah yes

was thinking of three throws (SP3T etc) but there are only two.

thanks
m

At 09:07 PM 5/24/2004, you wrote:
>On Mon, May 24, 2004 at 09:01:28PM -0400, mark s wrote:
> > hi list
> >
> > would a 3PDT on/off/on allow me to select between 3 outputs, or just two
> > (with the middle position non-conducting) ?
>
>3PDT has 3 poles, but two positions.  You're thinking of 2PDT Center Off,
or
>2PTT or whatever its called properly with 3 seperate selection
>points.  Guitars
>commonly have these although I dont know if you'd find one applicable to
your
>application.
>
>--
>  ------------------------------------------------------------------------
>  - Tom Arnold -       When I was small, I was in love,                  -
>  - Sysabend   -       In love with everything.                          -
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